PONTIRHAPHE 



428 



POTASSIUM 



the tympanic cavity extending from the pyramid to the 

 promontory and below the foramen ovale. 



Pontirhaphe ( pon-te-raf'-e) \_pons, abridge; pap], a 

 seam]. Wilder's name for the mesial basal groove of 

 the pons. 



Populus. (See Illus. Diet.) A genus of shrubs and 

 trees of the order Salicineee. P. monilifera, Ait., 

 cotton-wood, of the United States, is said to be a 

 powerful antiperiodic ; the wood and the bark of the 

 root are used. 



Porcelain. (See Illus. Diet.) P., Reaumur's, de- 

 vitrified glass, made by heating glass, containing little 

 alkaline silicate, to fusing point and then cooling 

 slowly. It is partially crystallized and may be made 

 transparent by refusion. 



Porcellaneous, Porcellanous (por-sel-a'-ne-us, por- 

 seP-an-us). Relating to or having the appearance of 

 porcelain ; applied to a condition of the skin in fever. 



Porcosan ( por'-ko-san). A remedy for hog erysipelas 

 prepared from weakened cultures of Bacillus erysipela- 

 tos suis, Koch. 



Porencephalitis ( por-en-sef-al-i' -tis) \_-6poc, pore ; 

 iyKecjxi/.oc, the brain]. Encephalitis with a tendency 

 to the formation of cavities. 



Pornotherapy ( por-no-ther' '-ap-e) \jropvr], a prostitute ; 

 depaneia, therapy]. The medical supervision of pros- 

 titutes as related to public hygiene. 



Porogamy (po-rog' '-am-e) \_~6poq, a pore ; yapor, a 

 marriage]. A term proposed by Treub for the usual 

 process of pollination in which the pollen tube reaches 

 the embryo-sac by the usual route of the micropyl. 

 Cf. Chalazogomy ; Mesogomy. 



Porphyreus ( por-pl'-re-us) [iroptyvpa, purple]. In 

 biology showing spots of purple upon a ground of 

 another hue. 



Porphyrin. (See Illus. Diet.) C 21 H 25 N 3 2 (Hesse). 

 A white substance, giving a blue fluorescence in acid 

 solutions melting at 97 ° C, obtained from Alstonia 

 constricta, F. v. Miil. It is antipyretic. 



Porphyuria {por-fe-u' -re -ah). See Porphyruria 

 (Illus. Diet.). 



Porriginous (por-if -in-us). Relating to porrigo ; 

 scurfy. 



Posadas-Bobrow's Operation. See under Operation. 



Posadas, Protozoic Disease of. See Dermatitis 

 Blastomycetic. 



Position. (See Illus. Diet.) P., Bonnet's, the posi- 

 tion assumed by the thigh in coxitis ; flexion, abduc- 

 tion, and outward rotation. P., Duncan's. See 

 under Placenta. P., Fowler's, that obtained by 

 elevating the foot of the bed 24 to 30 inches. P., 

 High Pelvic. See Posture, Trendelenburg' s (Illus. 

 Diet.). P., Schultze's. See under Placenta. P., 

 Walcher's, a dorsal posture with the hips at the edge 

 of the table and lower extremities hanging. 



Positivity (pos-it-iv'-it-e). The condition of a body 

 which exhibits positive electricity. 



Positor ( pos'-it-or) [pohere, to place]. See Repositor 

 (Illus. Diet.). 



Posologic. (See Illus. Diet.) P., Table, a dosage 

 table. 



Postaccessual {post-ak-ses'-u-al) [post, after ; acces- 

 sio, a paroxysm]. Occurring after a paroxysm. 



Postdiphtheric ( post-dif-ther'-ik). Following an at- 

 tack of diphtheria. 



Posteroexternal (post-e-ro-eks-tur' -nal). Fctad of a 

 posterior aspect. 



Posterointernal ( post-e-ro-in-tur'-nal). Entad of a 

 posterior aspect. 



Posteromedian ( post-e-rome'-de-an). Located in the 

 middle of a posterior aspect. 



Posthoplasty. "See Posthioplasty (Illus. Diet.). 



Posthypnotic (post-hip-uot'-ik). Applied to a sugges- 

 tion given during a hypnotic trance but intended to 

 operate after the trance has ceased. 



Postischial {post-is' -ke-al). Dorsad of the ischium. 



Postotic (post-c/-tik) [post, after; ore, ear]. Behind 

 the auditory vesicle. 



Postpneumonic [posl-riu-mon'-ik). Following pneu- 

 monia. 



Postponent (posl-po'-nent) [post, after ;' ponere, to 

 place]. Delayed in recurrence. 



Postpyramids \post-per' -am-ids). The posterior pyra- 

 mids. 



Postscarlatinal (post-skar-lat-i'-nal). Occurring after 

 scarlatina. 



Posttarsal (post-tar' -sal). Located behind the tarsus. 



Posttyphoid (post-ti'-Joid). Following typhoid. 



Postulate ( pos'-tti-lat) [postulare, to demand]. A 

 self-evident proposition. P.s, Koch's. See Law, 

 Koch's. 



Postvaccinal {post-vaks J 'sin-nal ). Following vaccina- 

 tion. 



Postvelum (postve'-lton) [post, after; velum, a veil]. 

 See Kilos. 



Potain's Method for indicating the size of the heart : 

 The greatest height of the cardiac area is multiplied 

 by the greatest breadth, and the product by an em- 

 piric coefficient, 0.83 ; the result in square centi- 

 meters is approximate if the figure obtained does not 

 deviate far from the usual outlines. 



Potamophobia (pot-am-op'-o'-be-a/t) [ttotouoc, river; 

 <po(lor, fear]. The morbid fear of rivers, lakes, and 

 other large sheets of water. 



Potash. (See Illus. Diet.) P., Alum, aluminium 

 and potassium sulfate. P., Aqueous, P., Solution 

 of. See Postassce liquor (Illus. Diet.). P. -blue. See 

 Potassium -blue (Illus. Diet.). P., Caustic, potas- 

 sium hydrate or potassium hydroxid. P., Red 

 Prussiate of. See Potassium Ferricyanid (Illus. 

 Diet.). P., Yellow Prussiate of. See Potassium 

 Ferrocy 'an id (111 us. Diet.). 



Potassa. (See Illus. Diet.) P., Sulfurated, a hard, 

 brittle, brown substance with alkaline, bitter taste ob- 

 tained by fusing together potassium carbonate and 

 sublimated sulfur. It is alterative and emetic. Used 

 internally in gout and scrofula. Dose, 2-10 gr. (0.13- 

 0.65 gm.). Externally in parasitic skin- diseases. 



Potassioantimonic {potas-e-o-an-ti-mo'-nik). Con- 

 taining potassium and antimony. 



Potassiobarytic (po-tas-e-o-bar-it'-ik). Containing 

 potassium and barium. 



Potassiocupric {po-tas-e-o-ku'-prik). Containing cop- 

 per and potassium. 



Potassium. (See Illus. Diet.) P. and Aluminium 

 Salicylate, a crystalline reaction-product of aluminium 

 salicylate and potassium acetate; soluble in water and 

 used as an antiseptic and in rheumatism. P. and 

 Ammonium Tartrate. NIL. KC 4 H 4 6 , transparent 

 crystals, soluble in water, obtained from cream of tar- 

 tar with ammonium carbonate. It is used as a cathar- 

 tic. P.-amylxanthogenate, K . (C'J I,, )('S 2 (), yel- 

 low scales, soluble in water, used as an antiparasitic. 

 P. Antimonate, K,H,Sb s O T -j 6H,0, small crystal- 

 line granules soluble in water. Syn., White oxid or 

 antimony ; diaphoretic antimony. P. Arsenate 

 K 2 IlAs() 4 , extremely poisonous crystals, soluble in 

 water; used as an antiperiodic and alterative. Dosei 

 ^-tV £ r - (0.003-0.006 gm.). Max. dose, ,'„ gr. 

 (0.006 gm.) single; x / 2 gr. (0.022 gm.) daily. P. 

 Aurobromid, AuBr,K6r f- 2H.O, purple crystals 

 soluble in water or alcohol, with a red brown color; 

 antiseptic. Subcutaneous dose, 0.C08-0 012 gm. P., 

 Benzoate, KC 7 II 5 0. ; -f- 3ll,0, white crystalline effer- 



